Yea how cool is that a 350 bored .040 Over.
I have plotted the old engine which was a 350 standard bore with 10.87 compression 601 heads ported with 1.84-1.50 valves and RPM intake.
Cam is 218-218@ .050 with .454" lift on a 106LSA Flat tappet cam.
Max HP was 258-261 at the wheels 2 different pulls changing timing. 35 and 38 total winner 38.
That max HP was at 5700rpm.
This 357" is same make pistons but chamber size puts it at 10.17 compression and the heads are Vortec 906 castings with porting and 1.94-1.50 valves and Jegs dual plane intake.
Cam is 228-228 duration @ .050 with .495" lift on a 110LSA It is a roller cam.
Max HP on this vortec head and roller cam came in at 5,840 RPM and 289HP.
I made 3 pulls back to back only changing timing.. timing made 9HP difference winner to 35 total timing.. less and it lost power.
Tq was 294 at the wheels at 4,680 RPM
I lost a bit of TQ below 4000 rpm going with the Vortec heads and larger roller cam.
Again the red line is the 601 heads which are 305 heads.
I have plotted the old engine which was a 350 standard bore with 10.87 compression 601 heads ported with 1.84-1.50 valves and RPM intake.
Cam is 218-218@ .050 with .454" lift on a 106LSA Flat tappet cam.
Max HP was 258-261 at the wheels 2 different pulls changing timing. 35 and 38 total winner 38.
That max HP was at 5700rpm.
This 357" is same make pistons but chamber size puts it at 10.17 compression and the heads are Vortec 906 castings with porting and 1.94-1.50 valves and Jegs dual plane intake.
Cam is 228-228 duration @ .050 with .495" lift on a 110LSA It is a roller cam.
Max HP on this vortec head and roller cam came in at 5,840 RPM and 289HP.
I made 3 pulls back to back only changing timing.. timing made 9HP difference winner to 35 total timing.. less and it lost power.
Tq was 294 at the wheels at 4,680 RPM
I lost a bit of TQ below 4000 rpm going with the Vortec heads and larger roller cam.
Again the red line is the 601 heads which are 305 heads.
